Programmable impedance control output circuit and programmable impedance control method thereof in semiconductor device

摘要: The invention relates to an impedance control output circuit of a semiconductor device and method relevant thereto prevent or minimize various problems caused by transmission error automatically resetting the mismatch resulting from variances supply voltage, temperature, other operational conditions. comprises: detection, comparison adjustment part for performing normal operation automatic reset comparing array reference voltage with pad connected external resistance obtain tracking predetermined resistant divider level constant voltage; driving data outputting terminal in response results thereby internal data.